<AWT Dev> <AWT dev>[9] Review request for 8151333: Some AWT functions may access an array outside of its bounds

[Semyon Sadetsky]

Hello,

Please review fix for JDK9:

bug: https://bugs.openjdk.java.net/browse/JDK-8151333
webrev: http://cr.openjdk.java.net/~ssadetsky/8151333/webrev.00/

This just suppose to be a potential issue. It is discovered by 
AddressSanitizer.
When Xinerama is used the number of screens that is seen by WM is always 
1. But X11GraphicsDevice#getDisplayMode() may be called with the "real" 
screen number and this is not checked in the native code and thus may 
cause incorrect memory addressing.
As a solution a check for validity of the screen number is added.
Test would require writing native code, so noreg-hard label is added.

--Semyon